Surge arrestors are recommended for lightning protection. Neutral grounding is not likely to reduce the total magnitude of over-voltage produced by lightning or switching surges. It can, however, distribute the voltage between phases and reduce the possibility of excessive voltage stress on the phase-to-ground insulation of a particular phase. A system ground connection even of relatively high resistance can effectively prevent static voltage build-up. Even under conditions of an HV line breaking and falling on an LV system, an effectively grounded LV system will hold the system neutral close to the ground potential thus limiting the over-voltage. An unearthed system will be subjected to resonant over-voltages. Field experi-ence and theoretical studies have shown the world over that arcing, re-striking or vibrating ground faults on unearthed systems can, under certain conditions, produce surge voltages as high as 6 times the normal voltage. Neutral grounding is effective in reducing transient build up by reducing the neutral displacement from ground potential and the destructiveness of any high frequency voltage oscillations following each arc initiation or restrike. We, at Atul Casting and Metal Works manufactures all earthing related products such as G.I Strips, G.I plates, G.I Rods, G.I Pipes, C.I covers, Cable Trays, G.I Wire, Manhole Covers and Route Markers for past 50 + Years in heart of New Delhi. Call us at +91 9873361672 for best deals.